Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8162761 | Physica B: Condensed Matter | 2014 | 4 Pages |
Abstract
The structural, magnetic and magnetocaloric effects for Ni50âxPdxMn37Sn13 Heusler alloys have been investigated around both structural and magnetic transitions. The room temperature X-ray diffraction indicates 10Â M modulated martensitic structure with an orthorhombic unit cell for x=0 and 1. However, the superstructure reflections for x=2 alloy imply that the pattern is related to the L21 phase. The maximum entropy change occurring at the martensitic transition is found to be 21Â JÂ kgâ1Â Kâ1 for Ni50Mn37Sn13 alloy around room temperature. Despite the smaller change in entropy around room temperature, 3.8 times larger value of refrigerant capacity (184.6Â J/kg) is achieved for 2% substitution of Pd, due to occurrence of magnetic entropy change in a broader temperature region.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Ritwik Saha, A.K. Nigam,